Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2b936ea3066db6bc0a762bd9d0ca2688c7b134b167c391b4bc75de6d7f83b2d3' 
  AND token = 'PORogEYk1T0xMb+xydg9rqcrVNtAd8u1xp3KeVtc9xs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}